Question

Casey likes to run she runs an additional 1/4 mile each day. On the last day she ran 1 1/4 miles if she ran 1/2 mile on her first day for how many days has she been running

Answer 1

it will have to taker her 10 days to run 

Answer 2

She ran for 10 days.
1/2 + 1/4 = 3/4 -->2nd day
4/4 -->3rd
5/4 -->4th
6/4 -->5th
7/4 -->6th
8/4 -->7th
9/4 -->8th
10/4 -->9th
11/4 -->10th